Engineering Questions with Answers - Multiple Choice Questions
MCQs on Gene Expression Control – Eukaryotes
1 - Question
The sheep Dolly was cloned in the year ___________
a) 1997
b) 1999
c) 2000
d) 2002
View Answer
Answer: a
Explanation: A team of Scottish researchers reported the cloning of a mammal in 1997, a lamb which they names as Dolly. This was the first cloned mammal ever reported.
2 - Question
Single cells from an adult animal can give rise to whole new individuals.
a) True
b) False
View Answer
Answer: b
Explanation: Single cells from an adult animal cannot give rise to whole new individuals however, nuclei from such cells possess all the information necessary for developing a new organism.
3 - Question
How many types of cells were fused in the cloning of Dolly?
a) 2
b) 5
c) 7
d) 8
View Answer
Answer: a
Explanation: Two types of cells from different sheep were taken and fused with the aid of an electrical impulse in the cloning of Dolly. Enucleated unfertilized eggs from one sheep and cultured epithelial cells from udder of an adult sheep were fused together.
4 - Question
. The transcriptional state of a cell is irreversible.
a) True
b) False
View Answer
Answer: b
Explanation: The transcriptional state of a cell depends on its chromatin, and is not irreversible. It rather depends on the environment which induces the types of genes that need to expressed.
5 - Question
The processing-level control is concerned with ____________
a) primary transcripts
b) secondary transcripts
c) tertiary transcripts
d) quaternary transcripts
View Answer
Answer: a
Explanation: The processing-level control is associated with primary transcripts and involves the processing of primary messenger RNAs in the nucleus before they begin with the translation in the cytoplasm.
6 - Question
What percent of a typical Red blood cell is constituted by hemoglobin?
a) 30
b) 50
c) 75
d) 95
View Answer
Answer: d
Explanation: Red Blood cell’s primary function is to carry oxygen. 95% of the RBC’s dry weight is made up of haemoglobin. Rest of the weight included the DNA, organelles and lipid membranes.
7 - Question
Which type of control determines for how long will a particular mRNA be translated?
a) Replication-level
b) Translational-level
c) Transcriptional-level
d) Processing-level
View Answer
Answer: b
Explanation: Translational-level control determines for how long a period, and how often a particular messenger RNA molecule is translated. The translational-level control is prevalent in the cytoplasm.